EP3567071B1 - Resin microparticle production method - Google Patents
Resin microparticle production method Download PDFInfo
- Publication number
- EP3567071B1 EP3567071B1 EP17890465.2A EP17890465A EP3567071B1 EP 3567071 B1 EP3567071 B1 EP 3567071B1 EP 17890465 A EP17890465 A EP 17890465A EP 3567071 B1 EP3567071 B1 EP 3567071B1
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- EP
- European Patent Office
- Prior art keywords
- resin
- particles
- thermoplastic resin
- washing
- equal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229920005989 resin Polymers 0.000 title claims description 134
- 239000011347 resin Substances 0.000 title claims description 134
- 238000004519 manufacturing process Methods 0.000 title claims description 40
- 239000011859 microparticle Substances 0.000 title claims description 38
- 239000002245 particle Substances 0.000 claims description 189
- 238000005406 washing Methods 0.000 claims description 72
- 229920005992 thermoplastic resin Polymers 0.000 claims description 53
- 125000003118 aryl group Chemical group 0.000 claims description 43
- 239000002904 solvent Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 20
- 238000010298 pulverizing process Methods 0.000 claims description 19
- 239000011541 reaction mixture Substances 0.000 claims description 15
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 9
- 230000002194 synthesizing effect Effects 0.000 claims description 8
- 239000004695 Polyether sulfone Substances 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- 229920006393 polyether sulfone Polymers 0.000 claims description 7
- 230000000379 polymerizing effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 30
- 239000004721 Polyphenylene oxide Substances 0.000 description 29
- 229920000570 polyether Polymers 0.000 description 29
- 125000004432 carbon atom Chemical group C* 0.000 description 28
- 238000006116 polymerization reaction Methods 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 24
- KZTYYGOKRVBIMI-UHFFFAOYSA-N diphenyl sulfone Chemical compound C=1C=CC=CC=1S(=O)(=O)C1=CC=CC=C1 KZTYYGOKRVBIMI-UHFFFAOYSA-N 0.000 description 20
- 239000003960 organic solvent Substances 0.000 description 19
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 17
- 238000012545 processing Methods 0.000 description 16
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 14
- 150000001875 compounds Chemical class 0.000 description 13
- 239000000203 mixture Substances 0.000 description 13
- 150000003839 salts Chemical class 0.000 description 13
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 12
- 229910052783 alkali metal Inorganic materials 0.000 description 12
- -1 alkali metal salt Chemical class 0.000 description 11
- 238000002844 melting Methods 0.000 description 11
- 230000008018 melting Effects 0.000 description 11
- 239000011148 porous material Substances 0.000 description 11
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 10
- 238000000691 measurement method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 238000005259 measurement Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000003513 alkali Substances 0.000 description 7
- 238000009826 distribution Methods 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 125000003545 alkoxy group Chemical group 0.000 description 6
- 125000000217 alkyl group Chemical group 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000011800 void material Substances 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 5
- 125000005843 halogen group Chemical group 0.000 description 5
- GPAPPPVRLPGFEQ-UHFFFAOYSA-N 4,4'-dichlorodiphenyl sulfone Chemical compound C1=CC(Cl)=CC=C1S(=O)(=O)C1=CC=C(Cl)C=C1 GPAPPPVRLPGFEQ-UHFFFAOYSA-N 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000002156 adsorbate Substances 0.000 description 4
- 125000001118 alkylidene group Chemical group 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000002798 polar solvent Substances 0.000 description 3
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 2
- 238000004438 BET method Methods 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000002159 adsorption--desorption isotherm Methods 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 125000001309 chloro group Chemical group Cl* 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000010299 mechanically pulverizing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 description 2
- 239000011736 potassium bicarbonate Substances 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 235000011181 potassium carbonates Nutrition 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- HHVIBTZHLRERCL-UHFFFAOYSA-N sulfonyldimethane Chemical compound CS(C)(=O)=O HHVIBTZHLRERCL-UHFFFAOYSA-N 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000009849 vacuum degassing Methods 0.000 description 2
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 description 1
- NYCCIHSMVNRABA-UHFFFAOYSA-N 1,3-diethylimidazolidin-2-one Chemical compound CCN1CCN(CC)C1=O NYCCIHSMVNRABA-UHFFFAOYSA-N 0.000 description 1
- MBDUIEKYVPVZJH-UHFFFAOYSA-N 1-ethylsulfonylethane Chemical compound CCS(=O)(=O)CC MBDUIEKYVPVZJH-UHFFFAOYSA-N 0.000 description 1
- ZDULHUHNYHJYKA-UHFFFAOYSA-N 2-propan-2-ylsulfonylpropane Chemical compound CC(C)S(=O)(=O)C(C)C ZDULHUHNYHJYKA-UHFFFAOYSA-N 0.000 description 1
- SUCTVKDVODFXFX-UHFFFAOYSA-N 4-(4-hydroxy-3,5-dimethylphenyl)sulfonyl-2,6-dimethylphenol Chemical compound CC1=C(O)C(C)=CC(S(=O)(=O)C=2C=C(C)C(O)=C(C)C=2)=C1 SUCTVKDVODFXFX-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 229920012266 Poly(ether sulfone) PES Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000002529 biphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C12)* 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 238000012993 chemical processing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 125000002510 isobutoxy group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])O* 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004957 naphthylene group Chemical group 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920005649 polyetherethersulfone Polymers 0.000 description 1
- 229940086066 potassium hydrogencarbonate Drugs 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 125000005920 sec-butoxy group Chemical group 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 125000004213 tert-butoxy group Chemical group [H]C([H])([H])C(O*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/14—Powdering or granulating by precipitation from solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/02—Making preforms by dividing preformed material, e.g. sheets, rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/20—Polysulfones
- C08G75/23—Polyethersulfones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G85/00—General processes for preparing compounds provided for in this subclass
- C08G85/002—Post-polymerisation treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
- C08J9/286—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum the liquid phase being a solvent for the monomers but not for the resulting macromolecular composition, i.e. macroporous or macroreticular polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
- C08J2201/044—Elimination of an inorganic solid phase
- C08J2201/0444—Salts
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
- C08J2201/05—Elimination by evaporation or heat degradation of a liquid phase
- C08J2201/0502—Elimination by evaporation or heat degradation of a liquid phase the liquid phase being organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
- C08J2201/054—Precipitating the polymer by adding a non-solvent or a different solvent
- C08J2201/0542—Precipitating the polymer by adding a non-solvent or a different solvent from an organic solvent-based polymer composition
- C08J2201/0544—Precipitating the polymer by adding a non-solvent or a different solvent from an organic solvent-based polymer composition the non-solvent being aqueous
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2381/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen, or carbon only; Polysulfones; Derivatives of such polymers
- C08J2381/06—Polysulfones; Polyethersulfones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
Definitions
- the present invention relates to a resin microparticle production method and resin particles.
- thermoplastic resin At the time of processing a thermoplastic resin into a sheet form or performing chemical processing, the thermoplastic resin is dissolved in an organic solvent to be a solution in some cases.
- thermoplastic resin is dissolved in a liquid monomer or a liquid-curable resin to be a solution in some cases.
- the thermoplastic resin used for such use is pulverized and microparticulated to increase a dissolution rate with respect to a liquid such as solvent or monomer in some cases.
- thermoplastic resin As a method of producing microparticles of a thermoplastic resin, in general, a method of mechanically pulverizing particles of a thermoplastic resin using an impact type pulverizer is known.
- the impact type pulverizer resin particles are pulverized using impact at the time at which resin particles collide with something, such as a collision between resins, a collision between a resin and a rotating stirring vane, and a collision between a resin and a device wall surface of a pulverizer.
- a method of performing pulverization while cooling heat generated at the time of pulverization using a cooling agent such as dry ice and liquid nitrogen is known (for example, refer to PTLs 1 and 2).
- JP H04 67 912 suggests an easy method for producing a fine powder of thermoplastic resin via dissolution in a solvent and precipitation.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a resin microparticle production method with improved processing capacity. In addition, another object of the present invention is to provide resin particles appropriate for microparticulation processing.
- an aspect of the present invention provides a resin microparticle production method including a step of pulverizing resin particles having a thermoplastic resin as a forming material and having a BET specific surface area of equal to or more than 5 m 2 /g using an impact type pulverizer.
- a production method may include a step of polymerizing a thermoplastic resin with a solvent, a step of precipitating the thermoplastic resin from a reaction mixture obtained by the polymerizing step to obtain intermediate particles containing the thermoplastic resin, and a step of washing the intermediate particles with a fixed bed type washing apparatus to obtain the resin particles, prior to the pulverizing step.
- thermoplastic resin has an aromatic group in a main chain.
- the thermoplastic resin may have a sulfonyl group in a main chain.
- thermoplastic resin may be aromatic polyether sulfone.
- a reduced viscosity (Rv) of the thermoplastic resin may be equal to or less than 0.36 dL/g.
- a median particle diameter D50 of a resin particle is equal to or more than 200 ⁇ m and a median particle diameter D50 of the resin microparticle is equal to or more than 10 ⁇ m and equal to or less than 100 ⁇ m.
- an aspect of the present invention provides the use of resin particles of aromatic polyether sulfone as a forming material and having a BET specific surface area of equal to or more than 5 m 2 /g.
- a resin microparticle production method includes a step of pulverizing resin particles having a thermoplastic resin as a forming material and having a BET specific surface area of equal to or more than 5 m 2 /g using an impact type pulverizer.
- resin particles according to the present embodiment have aromatic polyether as a forming material and have a BET specific surface area of equal to or more than 5 m 2 /g.
- thermoplastic resin (Thermoplastic resin)
- thermoplastic resin used in the resin microparticle production method according to the present embodiment a thermoplastic resin polymerized by solution polymerization is appropriately used.
- thermoplastic resin used in the resin microparticle production method of the present embodiment is a thermoplastic resin having an aromatic group in a main chain .
- aromatic group examples include a phenylene group, a biphenylene group, and a naphthylene group.
- the main chain in the present specification means a longest chain structure.
- thermoplastic resin used in the resin microparticle production method of the present embodiment a thermoplastic resin having a sulfonyl group or a carbonyl group in the main chain is preferable.
- thermoplastic resin having such a group in the main chain is excellent in solvent resistance and is hardly soluble in a solvent in many cases.
- microparticles of the thermoplastic resin are produced by the resin microparticle production method of the invention of the present application, it is possible to improve a dissolution rate in a solvent, thereby improving workability.
- thermoplastic resin applicable to the resin microparticle production method of the present embodiment, aromatic polyether will be exemplified and described in detail.
- Aromatic polyether has the following general formula (E) as a constituent unit.
- Y represents -SO 2 - or -CO-.
- Z represents a single bond, an alkylidene group having 1 to 10 carbon atoms, -SO 2 -, or -CO-.
- R 1 , R 2 , R 3 and R 4 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, n 1 , n 2 , n 3 , and n 4 each independently represents an integer of 0 to 4.
- n 1 , n 2 , n 3 , or n 4 is an integer of 2 to 4
- a plurality of R 1 , R 2 , R 3 or R 4 may be the same as one another, or may be different from one another.
- aromatic polyether in which Y is a sulfonyl group (-SO 2 -), and Z is a single bond or an alkylidene group having 1 to 10 carbon atoms is referred to as aromatic polyether ether sulfone.
- aromatic polyether in which Y and Z are a sulfonyl group (-SO 2 -) is referred to as aromatic polyether sulfone.
- aromatic polyether in which Y is a carbonyl group (-CO-) and Z is a single bond or an alkylidene group having 1 to 10 carbon atoms is referred to as aromatic polyether ether ketone.
- aromatic polyether in which Y and Z are a carbonyl group (-CO-) is referred to as aromatic polyether ketone.
- Y and Z are preferably a sulfonyl group.
- FIG. 1 is a flowchart illustrating a resin microparticle production method in an embodiment of the present invention.
- a resin microparticle production method of the present embodiment may include a step of synthesizing a thermoplastic resin (step S1), a step of obtaining intermediate particles containing a thermoplastic resin (step S2), a step of obtaining resin particles having a BET specific surface area of equal to or more than 5 m 2 /g (step S3), and a step of pulverizing the resin particles (step S4).
- thermoplastic resin a case of using aromatic polyether will be described as an example of a thermoplastic resin.
- Aromatic polyether is obtained by polymerizing a dihalogeno compound (A) represented by the following general formula (A) (hereinafter, simply referred to as “dihalogeno compound (A)”) and a divalent phenol (B) represented by the following general formula (B) (hereinafter, simply referred to as “divalent phenol (B)”) as monomers.
- a dihalogeno compound (A) represented by the following general formula (A)
- B divalent phenol
- X and X' each independently represents a halogen atom.
- Y and Z are the same as described above.
- R 1 , R 2 , R 3 and R 4 are the same as described above
- n 1 , n 2 , n 3 , and n 4 are the same as described above.
- n 1 , n 2 , n 3 , or n 4 is an integer of 2 to 4
- a plurality of R 1 , R 2 , R 3 or R 4 may be the same as one another, or may be different from one another.
- the dihalogeno compound (A) is represented by the general formula (A).
- X and X' each independently represents a halogen atom.
- the halogen atom include a chlorine atom, a bromine atom, and an iodine atom, and the chlorine atom is preferable.
- X and X' each independently may be bonded to any of carbon atoms of a second position, a third position, and a fourth position when a position number of a carbon atom bonded to Y is a first position, but the carbon atom of the fourth position is preferable.
- Y represents -SO 2 - or -CO- as described above, and is preferably -SO 2 -.
- the dihalogeno compound (A) is preferably bis(4-chlorophenyl) sulfone to which any one or both of R 3 and R 4 may be bonded instead of a hydrogen atom.
- R 3 and R 4 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.
- the alkyl group in R 3 and R 4 may be in any of a straight-chain shape, a branched shape, and a cyclic shape, but is preferably a straight-chain shape or a branched shape. Examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- the alkoxy group in R 3 and R 4 may be in any of a straight-chain shape, a branched shape, and a cyclic shape, but is preferably a straight-chain shape or a branched shape. Examples thereof include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a sec-butoxy group, and a tert-butoxy group.
- n 3 is a bond number of R 3
- n 4 is a bond number of R 4
- R 3 and R 4 each independently represents an integer of 0 to 4.
- a bond position of corresponding R 3 and R 4 is not particularly limited as long as the bond position is other than a bond position of a halogen atom of X and X' and Y, and when the position number of the carbon atom to which a sulfonyl group of a benzene ring skeleton is bonded may be set as a first position, R 3 and R 4 may be bonded to any of carbon atoms of a second position, a third position, a fourth position, a fifth position, and a sixth position, R 3 and R 4 are preferably bonded to a carbon atom other than the fourth position, and are preferably bonded to carbon atoms of the third position and the fifth position.
- n 3 or n 4 is an integer of 2 to 4
- a plurality of R 3 or R 4 each independently may be the same as one another, or may be different from one another.
- all of n 3 R 3 may be the same, or may be different, and in a case where n 3 is 3 or 4, only some thereof may be the same.
- n 4 R 4 may be also the same.
- n 3 and n 4 each independently is preferably an integer of 0 to 3, more preferably an integer of 0 to 2, and particularly preferably 0 or 1.
- dihalogeno compound (A) examples include bis(4-chlorophenyl) sulfone (also referred to as 4,4'-dichlorodiphenyl sulfone).
- the divalent phenol (B) is represented by the following general formula (B).
- two hydroxy groups may be bonded to any of carbon atoms of a second position, a third position, and a fourth position when the position number of carbon atoms to which Z is bonded is set as a first position, but is preferably bonded to a carbon atom of the fourth position.
- Z represents a single bond, an alkylidene group having 1 to 10 carbon atoms, -SO 2 -, or -CO-, as described above, and is preferably -SO 2 -.
- R 1 and R 2 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and R 3 and R 4 are the same.
- n 1 is a bond number of R 1
- n 2 is a bond number of R 2
- n 1 and n 2 each independently represents an integer of 0 to 4.
- n 1 and n 2 are the same as n 3 and n 4 .
- a bond position of corresponding R 1 and R 2 is not particularly limited as long as the bond position of corresponding R 1 and R 2 is other than bond positions of a hydroxy group or Z, and when a position number of a carbon atom to which a sulfonyl group of benzene ring skeleton is bonded is set as a first position, R 1 and R 2 may be bonded to any of carbon atoms of a second position, a third position, a fourth position, a fifth position, and a sixth position, preferably bonded to carbon atoms other than those of the fourth position, and preferably bonded to carbon atoms of the third position and the fifth position.
- n 1 or n 2 is an integer of 2 to 4
- a plurality of R 1 and R 2 may be the same as one another, or may be different from one another.
- n 1 is an integer of 2 to 4
- all of n 1 R 1 may be the same, or may be different, and in a case where n 1 is 3 or 4, some of n 1 R 1 may be the same.
- n 2 R 2 is also the same.
- n 1 and n 2 each independently may be preferably an integer of 0 to 3, more preferably an integer of 0 to 2, and particularly preferably 0 or 1.
- Examples of preferable divalent phenol (B) include bis(4-hydroxyphenyl) sulfone and bis(4-hydroxy-3,5-dimethyl phenyl) sulfone to which any one or both of R 1 and R 2 may be bonded instead of a hydrogen atom.
- Polymerization (polycondensation) of the dihalogeno compound (A) and the divalent phenol (B) is preferably performed by using an alkali metal salt of carbonic acid as a base, is preferably performed in an organic solvent as a polymerization solvent, and is more preferably performed in an organic solvent by using an alkali metal salt of carbonic acid as a base.
- the alkali metal salt of a carbonic acid may be alkali carbonate (carbonate of alkali metal) which is a normal salt, may be alkali bicarbonate (alkali hydrogen carbonate, hydrogen carbonate of alkali metal) which is an acid salt, or may be a mixture of these (alkali carbonate and alkali bicarbonate).
- alkali carbonate examples include sodium carbonate, potassium carbonate, and the like.
- alkali bicarbonate examples include sodium bicarbonate (also referred to as sodium hydrogen carbonate), potassium bicarbonate (also referred to as potassium hydrogen carbonate), and the like.
- the organic solvent is preferably an organic polar solvent.
- organic polar solvents examples include dimethyl sulfoxide (melting point: 19°C), 1-methyl-2-pyrrolidone (melting point: -24°C), sulfolane (1,1-dioxochiran) (melting point: 27.5°C), 1,3-dimethyl-2-imidazolidinone (melting point: 8.2°C), 1,3-diethyl-2-imidazolidinone, dimethyl sulfone (melting point: 109°C), diethyl sulfone (melting point: 73°C), diisopropyl sulfone, diphenyl sulfone (melting point: 127°C), and the like.
- the dihalogeno compound (A) and the divalent phenol (B) are dissolved in an organic solvent.
- a temperature of dissolving the dihalogeno compound (A) and the divalent phenol (B) is, for example, in a range of 40°C to 180°C.
- a total mass of the dihalogeno compound (A) and the divalent phenol (B) with respect to 1kg of the organic solvent is 0.3 to 3.0 kg, and is preferably 0.5 to 1.7 kg.
- intermediate particles to be described below include an appropriate amount of the organic solvent.
- a mixture solution including an aromatic polyether generated by polymerization, an organic solvent, and a salt derived from an alkali metal salt of carbonate is referred to as a reaction mixture.
- a ratio of the alkali metal salt of carbonate with respect to the divalent phenol (B) is 47 to 52 mol%, and is more preferably 48 to 51 mol%.
- intermediate particles to be described later include an appropriate amount of salt derived from the alkali metal salt of carbonate.
- a polymerization temperature is preferably 160°C to 400°C.
- the temperature is gradually raised while removing by-produced water to reach a reflux temperature of the organic polar solvent, and the temperature may be preferably maintained for 1 to 50 hours, and more preferably maintained for 2 to 30 hours.
- a method of polymerization is not limited to the above-described method.
- polymerization may be performed by reacting the divalent phenol (B) and an alkali metal salt of carbonate in an organic solvent, removing by-produced water, and adding the dihalogeno compound (A) to the obtained reaction mixture.
- the reduced viscosity of the obtained aromatic polyether is preferably equal to or less than 0.36 dL/g.
- the reduced viscosity of the aromatic polyether is preferably equal to or more than 0.18 dL/g.
- the reduced viscosity of the aromatic polyether is preferably 0.18 to 0.36 dL/g, and more preferably 0.22 to 0.28 dL/g.
- a specific viscosity (( ⁇ - ⁇ 0 )/( ⁇ 0 )) is obtained.
- a value obtained by dividing the obtained specific viscosity by a concentration (approximately 1 g/dL) of the solution used for measurement is regarded as a reduced viscosity (dL/g) of aromatic polyether.
- thermoplastic resin is precipitated from a reaction mixture obtained in the step of polymerizing a thermoplastic resin, and intermediate particles containing the thermoplastic resin (hereinafter, referred to as intermediate particles) are obtained.
- an organic solvent having a relatively high melting point specifically, a melting point is equal to or more than 40°C
- a melting point is equal to or more than 40°C
- intermediate particles by mixing a reaction mixture product and a poor solvent of aromatic polyether and precipitating aromatic polyether contained in the reaction mixture product.
- the precipitated aromatic polyether may be pulverized at an appropriate size to obtain the intermediate particles.
- the reaction mixture is, for example, cooled to room temperature.
- the obtained intermediate particles include the solvent and a salt included in the reaction mixture and used at the time of polymerization.
- the poor solvent of aromatic polyether include methanol, ethanol, 2-propanol, hexane, heptane, and water.
- a median particle diameter (median diameter) D 50 of the intermediate particles is, for example, 200 ⁇ m to 1,000 ⁇ m.
- the median particle diameter (median diameter) D 50 of the intermediate particles can be measured by a laser diffraction dry measurement method. More specifically, under the following condition, a particle distribution is measured by a laser diffraction cyclic measurement method using a particle size distribution measurement apparatus (manufactured by Malvern Corporation, Mastersizer 2000), and the median particle diameter D 50 is obtained from the measurement result.
- FIG. 2 is a schematic view illustrating an aspect of washing in Step S3.
- intermediate particles are indicated as reference numeral 100, and the resin particles obtained by washing are indicated as reference numeral 150.
- the illustrated intermediate particles 100 include a resin portion 101 in which aromatic polyether has been solidified, a salt 102 of which at least a part is included in the resin portion 101, and a polymerization solvent 103 of which at least a part is included in the resin portion 101.
- a ratio of the resin portion 101 with respect to a mass of the intermediate particles 100 is 20% by mass to 60% by mass, and more preferably 30% by mass to 50% by mass.
- the intermediate particles 100 For washing of the intermediate particles 100, it is preferable to use water or hot water. By washing the intermediate particles 100 with water or hot water, it is possible to remove a water-soluble salt 102 such as a non-reactive base included in intermediate particles and by-produced halogenized alkali metal salt. When the salt 102 is removed, a void 109 is generated at a site where the salt 102 was present.
- a water-soluble salt 102 such as a non-reactive base included in intermediate particles and by-produced halogenized alkali metal salt.
- the intermediate particles 100 it is preferable to wash the intermediate particles 100 by using an organic solvent.
- an organic solvent By washing the intermediate particles 100 with an organic solvent, it is possible to remove a polymerization solvent 103 in which the intermediate particles 100 are included. At this time, in a case where the removed polymerization solvent 103 is solidified in the intermediate particles 100, the void 109 is generated at a site where the polymerization solvent 103 was present.
- washing solution used for washing examples include alcohols such as methanol, ethanol, and 2-propanol, ketones such as acetone, methyl ethyl ketone, ethers such as diethyl ether, and esters such as ethyl acetate and butyl acetate. These may be used alone, or two or more by mixing with one another. Depending on the kind of the polymerization solvent 103 to be removed, appropriate selection can be made.
- the particles (resin portion 101) after washing are appropriately washed with water, the salt and the organic solvent included in the void 109 are replaced with water, and then dried to obtain resin particles 150 having a plurality of voids 109.
- washing using water or hot water and washing using the organic solvent may be reversed.
- the order of washing using water or hot water and washing using the organic solvent may be reversed.
- washing using the organic solvent may be performed a plurality of times, and washing using water or hot water and washing using the organic solvent may be alternately performed a plurality of times.
- the intermediate particles 100 are preferably in a fixed phase.
- a fixed bed type washing apparatus indicates an apparatus of a type for washing the intermediate particles 100 in a state of fixing the intermediate particles 100 in a container accommodating the intermediate particles 100 which are washing subjects in a washing apparatus.
- impurities salt 102, polymerization solvent 103
- the fixed bed type washing apparatus for example, a washing apparatus in which intermediate particles 100 are filled in a column, and a washing solution is distributed from a column upper portion, a washing apparatus in which a washing solution is distributed by a centrifugal force, or a washing apparatus in which a washing solution is distributed by pressurization or a reduced pressure is exemplified.
- the washing solution may be provided such that the intermediate particles 100 are immersed in the washing solution, or may be provided by being sprayed on a surface of the intermediate particles 100.
- a pressure may be applied to a washing liquid surface or a normal pressure may be applied thereto.
- a passing liquid amount of the washing solution is preferably 30 kg to 1,000 kg, more preferably 50 kg to 500 kg, and further more preferably 100 kg to 400 kg, with respect to 1 kg of the resin particles 150 included in the intermediate particles 100.
- such an amount of washing solution is preferably fed in a state in which an upper surface of cake made of the intermediate particles 100 filled in a column is immersed in the washing solution.
- an amount of the resin particles 150 included in the intermediate particles 100 can be estimated from a charge amount of a monomer or a past reaction result.
- a height (cake height) of the intermediate particles 100 provided a fixed bed type washing apparatus is preferably 30 cm to 200 cm, and more preferably 50 cm to 150 cm.
- a height (cake height) of the intermediate particles 100 provided a fixed bed type washing apparatus is preferably 30 cm to 200 cm, and more preferably 50 cm to 150 cm.
- the resin particles 150 by performing washing having the intermediate particles 100 as a fixed phase as described above, for example, by washing the resin particles using a fixed bed type washing apparatus, it is possible to preferably obtain resin particles 150 having a BET specific surface area of equal to or more than 5 m 2 /g.
- the resin particles 150 obtained as above correspond to the "resin particles" in the present invention.
- the resin particles are raw materials used in production of resin microparticles.
- the BET specific surface area of the resin particles 150 is preferably equal to or more than 7 m 2 /g, and more preferably equal to or more than 10 m 2 /g. In addition, the BET specific surface area of the resin particles 150 is preferably as wide as possible, but is in a certain range considering the ease of production. The BET specific surface area of the resin particles 150 is preferably equal to or less than 100 m 2 /g, more preferably equal to or less than 50 m 2 /g, and further more preferably equal to or more than 30 m 2 /g.
- the BET specific surface area is preferably 5 m 2 /g to 100 m 2 /g, more preferably 7 m 2 /g to 50 m 2 /g, and further more preferably 10 m 2 /g to 30 m 2 /g.
- a pore volume of the resin particles 150 is preferably equal to or more than 0.08 cm 3 /g, and more preferably equal to or more than 0.1 cm 3 /g.
- the pore volume of the resin particles 150 is preferably as large as possible, but may be in a certain range considering the ease of production.
- the pore volume of the resin particles 150 is preferably equal to or more than 0.6 cm 3 /g, and more preferably equal to or less than 0.4 cm 3 /g.
- the pore volume is preferably 0.08 cm 3 /g to 0.6 cm 3 /g, and more preferably 0.1 cm 3 /g to 0.4 cm 3 /g.
- the BET specific surface area and the pore volume can be measured by using a BET specific surface area meter. More specifically, under the following condition, the values are values measured by a nitrogen adsorption method.
- the BET specific surface area is affected by a particle size, but in the resin particles 150 of the present embodiment, an amount of the void 109 formed in the resin particles 150 is more dominant.
- the BET specific surface area becomes much lower than 5 m 2 /g, but in the resin particles 150 of the present invention, as a plurality of voids 109 are present inside, a BET specific surface area of equal to or more than 5 m 2 /g is realized. That is, the resin particles in the present embodiment are particles having a plurality of voids therein.
- the resin particles 150 having a BET specific surface area of equal to or more than 5 m 2 /g are pulverized using an impact type pulverizer to obtain microparticles of a thermoplastic resin.
- a median particle diameter D 50 of the resin particles 150 is equal to or more than 200 ⁇ m, and preferably 200 ⁇ m to 1,000 ⁇ m.
- the median particle diameter D 50 of the obtained resin microparticles is 10 ⁇ m to 100 ⁇ m.
- Step S4 the resin particles 150 having a BET specific surface area of equal to or more than 5 m 2 /g are pulverized using an impact type pulverizer such that the median particle diameter D 50 of the obtained resin particles is 10 ⁇ m to 100 ⁇ m.
- the resin particles 150 as a pulverization subject are porous, it is possible to easily perform pulverization at normal temperature. Therefore, efficiency of pulverization processing is improved compared to a method in the related art in which the pulverization subject is solid resin particles.
- the impact type pulverizer a commercially available device can be appropriately used.
- the commercially available impact type pulverizer for example, an ACM Pulverizer (manufactured by Hosokawa Micron Corporation) and the like can be used.
- a pulverizer current be 45 to 71 A (30 to 35 A at the time of idling), a classifier current be 6.5 to 7.5 A (6.0 to 7.0 A at the time of idling), a feed rate of the resin particles 150 be 30 to 40 kg/hr, and an operation time be equal to or longer than 10 min.
- the resin microparticles produced in such a manner can shorten a dissolution time for dissolving into a liquid such as a monomer of a thermoplastic resin. For this reason, the resin microparticles produced by the resin microparticle production method of the present embodiment are excellent in productivity in production of a composite including a thermosetting resin and aromatic polyether.
- the resin microparticle production method and the resin particles of the present embodiment have the above-described structure.
- the resin particles having the above-described structure are appropriate for micronizing processing at normal temperature.
- Another aspect of the present invention is a resin microparticle production method including a step of pulverizing resin particles of a thermoplastic resin having a BET specific surface area of 5 m 2 /g to 100 m 2 /g and having a sulfonyl group in a main chain using an impact type pulverizer.
- a step of synthesizing the thermoplastic resin by polymerizing the general formula (A) and the general formula (B) in a solvent, a step of obtaining intermediate particles containing the thermoplastic resin by precipitating the thermoplastic resin from a reaction mixture obtained in the synthesizing step, and a step of obtaining resin particles by washing the obtained intermediate particles as a solid phase may be included,
- Y in the general formula (A) is -SO 2 -
- X and X' each independently represents a halogen atom
- R 3 and R 4 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms
- n 3 and n 4 is 0 or 1
- Z in the general formula (B) is -SO 2 -
- R 1 and R 2 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms
- n 1 and n 2 are 0 or 1.
- a pore volume of the resin particle may be equal to or more than 0.08 cm 3 /g and equal to or less than 0.6 cm 3 /g.
- Another aspect of the present invention is a resin particle production method including a step of synthesizing the thermoplastic resin by polymerizing a monomer in a solvent, a step of obtaining intermediate particles containing the thermoplastic resin by precipitating the thermoplastic resin from a reaction mixture obtained in the synthesizing step, and a step of obtaining resin particles by washing the obtained intermediate particles as a solid phase.
- the resin particles produced by the resin particle production method may be resin particles including aromatic polyether sulfone and having a BET specific surface area of equal to or more than 5 m 2 /g.
- each of physical properties was measured by the following measurement method.
- a BET specific surface area and a pore volume of the particle were measured by a nitrogen adsorption method under the following condition.
- a particle size distribution was measured by a laser diffraction dry measurement method and a median particle diameter D 50 of a particle is obtained from the measurement result.
- a washed state of the resin particle was checked by measuring an amount of residual diphenyl sulfone of the resin particle.
- Bis(4-hydroxyphenyl) sulfone (300.3 g, 1.20 mol), bis(4-chlorophenyl) sulfone (331.5 g, 1.16 mol), and diphenyl sulfone (560.9 g) as a polymerization solvent were charged in a polymerization vessel equipped with a stirrer, a nitrogen introduction tube, a thermometer, and a capacitor attached with a receiver in the tip end, and the temperature was raised to 180°C while distributing nitrogen gas in the system.
- reaction solution was cooled and solidified, and then the obtained solid was finely pulverized to obtain intermediate particles containing a thermoplastic resin.
- a BET specific surface area of the obtained intermediate particles was 0.25 m 2 /g.
- the obtained intermediate particles were dispersed in warm water (60°C), and washed by stirring.
- a BET specific surface area of the intermediate particles after washing with warm water was 0.28 m 2 /g.
- the intermediate particles after washing were filled in a column type fixed bed washer.
- a temperature of the mixture solvent was 20°C.
- 1 kg of resin particles contained in the intermediate particles filled in the fixed bed type washer was washed using 250 kg of the mixture solvent as a washing solution.
- a height (cake height) of the resin particles filled in the column was 110 cm.
- the obtained solid was heated and dried at 150°C to obtain resin particles of Example 1.
- the intermediate particles obtained by the same operation as that of Example 1 were dispersed in warm water (60°C) in a washing tank equipped with a stirrer, stirred washing was performed, and then solid-liquid separation was performed. Stirred washing with warm water was performed three times.
- the obtained solid was further washed with water.
- the obtained solid was heated and dried at 150°C to obtain resin particles of Comparative Example 1.
- the resin particles obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were pulverized at normal temperature by an impact type pulverizer (manufactured by Hosokawa Micron Corporation, ACM pulverizer) to obtain resin microparticles of aromatic polyether sulfone. At this time, a feed rate was adjusted such that pulverization load of the apparatus was the maximum so as to obtain maximum processing capacity.
- ACM pulverizer manufactured by Hosokawa Micron Corporation
Description
- The present invention relates to a resin microparticle production method and resin particles.
- At the time of processing a thermoplastic resin into a sheet form or performing chemical processing, the thermoplastic resin is dissolved in an organic solvent to be a solution in some cases. In addition, at the time of producing a composite material obtained by dispersing the thermoplastic resin in a thermosetting resin, the thermoplastic resin is dissolved in a liquid monomer or a liquid-curable resin to be a solution in some cases. The thermoplastic resin used for such use is pulverized and microparticulated to increase a dissolution rate with respect to a liquid such as solvent or monomer in some cases.
- As a method of producing microparticles of a thermoplastic resin, in general, a method of mechanically pulverizing particles of a thermoplastic resin using an impact type pulverizer is known. In the impact type pulverizer, resin particles are pulverized using impact at the time at which resin particles collide with something, such as a collision between resins, a collision between a resin and a rotating stirring vane, and a collision between a resin and a device wall surface of a pulverizer. In addition, at the time of microparticulating a large amount of resin particles, a method of performing pulverization while cooling heat generated at the time of pulverization using a cooling agent such as dry ice and liquid nitrogen is known (for example, refer to PTLs 1 and 2).
-
- [PTL 1]
Japanese Unexamined Patent Application, First Publication No. S62-185720 - [PTL 2]
Japanese Unexamined Patent Application, First Publication No. 2006-15497 - However, in a case of a pulverization method using a cooling agent, investment in facilities for making a facility capable of using a cooling agent is required and the running cost is increased by using the cooling agent, and thus the production cost is increased.
- Therefore, at the time of microparticulating resin particles at a room temperature, a method of improving processing capacity is sought. For instance,
JP H04 67 912 - The present invention has been made in view of such circumstances, and an object of the present invention is to provide a resin microparticle production method with improved processing capacity. In addition, another object of the present invention is to provide resin particles appropriate for microparticulation processing.
- To solve the above problems, an aspect of the present invention provides a resin microparticle production method including a step of pulverizing resin particles having a thermoplastic resin as a forming material and having a BET specific surface area of equal to or more than 5 m2/g using an impact type pulverizer.
- A production method according to an aspect of the present invention may include a step of polymerizing a thermoplastic resin with a solvent, a step of precipitating the thermoplastic resin from a reaction mixture obtained by the polymerizing step to obtain intermediate particles containing the thermoplastic resin, and a step of washing the intermediate particles with a fixed bed type washing apparatus to obtain the resin particles, prior to the pulverizing step.
- In the production method according to an aspect of the present invention, the thermoplastic resin has an aromatic group in a main chain.
- In the production method according to an aspect of the present invention, the thermoplastic resin may have a sulfonyl group in a main chain.
- In the production method according to an aspect of the present invention, the thermoplastic resin may be aromatic polyether sulfone.
- In the production method according to an aspect of the present invention, a reduced viscosity (Rv) of the thermoplastic resin may be equal to or less than 0.36 dL/g.
- In the production method according to an aspect of the present invention, a median particle diameter D50 of a resin particle is equal to or more than 200 µm and a median particle diameter D50 of the resin microparticle is equal to or more than 10 µm and equal to or less than 100 µm.
- In addition, an aspect of the present invention provides the use of resin particles of aromatic polyether sulfone as a forming material and having a BET specific surface area of equal to or more than 5 m2/g.
- The present invention is stated in the claims.
- According to the present invention, it is possible to provide a resin microparticle production method with improved processing capacity. In addition, it is possible to provide resin particles appropriate for microparticulation processing.
-
-
FIG. 1 is a flowchart illustrating a resin microparticle production method in an embodiment of the present invention. -
FIG. 2 is a schematic diagram illustrating a state of washing in step S3 of the resin microparticle production method in an embodiment of the present invention. - A resin microparticle production method according to the present embodiment includes a step of pulverizing resin particles having a thermoplastic resin as a forming material and having a BET specific surface area of equal to or more than 5 m2/g using an impact type pulverizer.
- In addition, resin particles according to the present embodiment have aromatic polyether as a forming material and have a BET specific surface area of equal to or more than 5 m2/g.
- Hereinafter, the present invention will be described in order.
- As a thermoplastic resin used in the resin microparticle production method according to the present embodiment, a thermoplastic resin polymerized by solution polymerization is appropriately used.
- The thermoplastic resin used in the resin microparticle production method of the present embodiment is a thermoplastic resin having an aromatic group in a main chain .
- Examples of the aromatic group include a phenylene group, a biphenylene group, and a naphthylene group.
- The main chain in the present specification means a longest chain structure.
- In addition, as the thermoplastic resin used in the resin microparticle production method of the present embodiment, a thermoplastic resin having a sulfonyl group or a carbonyl group in the main chain is preferable.
- In general, a thermoplastic resin having such a group in the main chain is excellent in solvent resistance and is hardly soluble in a solvent in many cases. When microparticles of the thermoplastic resin are produced by the resin microparticle production method of the invention of the present application, it is possible to improve a dissolution rate in a solvent, thereby improving workability.
- Hereinafter, as a thermoplastic resin applicable to the resin microparticle production method of the present embodiment, aromatic polyether will be exemplified and described in detail.
- Aromatic polyether has the following general formula (E) as a constituent unit.
- In the formula (E), aromatic polyether in which Y is a sulfonyl group (-SO2-), and Z is a single bond or an alkylidene group having 1 to 10 carbon atoms is referred to as aromatic polyether ether sulfone. In addition, in the formula (E), aromatic polyether in which Y and Z are a sulfonyl group (-SO2-) is referred to as aromatic polyether sulfone.
- In addition, aromatic polyether in which Y is a carbonyl group (-CO-) and Z is a single bond or an alkylidene group having 1 to 10 carbon atoms is referred to as aromatic polyether ether ketone. In addition, aromatic polyether in which Y and Z are a carbonyl group (-CO-) is referred to as aromatic polyether ketone.
- Y and Z are preferably a sulfonyl group.
-
FIG. 1 is a flowchart illustrating a resin microparticle production method in an embodiment of the present invention. A resin microparticle production method of the present embodiment may include a step of synthesizing a thermoplastic resin (step S1), a step of obtaining intermediate particles containing a thermoplastic resin (step S2), a step of obtaining resin particles having a BET specific surface area of equal to or more than 5 m2/g (step S3), and a step of pulverizing the resin particles (step S4). - In the following description, a case of using aromatic polyether will be described as an example of a thermoplastic resin.
- Aromatic polyether is obtained by polymerizing a dihalogeno compound (A) represented by the following general formula (A) (hereinafter, simply referred to as "dihalogeno compound (A)") and a divalent phenol (B) represented by the following general formula (B) (hereinafter, simply referred to as "divalent phenol (B)") as monomers.
- The dihalogeno compound (A) is represented by the general formula (A).
- In the formula, X and X' each independently represents a halogen atom. Examples of the halogen atom include a chlorine atom, a bromine atom, and an iodine atom, and the chlorine atom is preferable.
- X and X' each independently may be bonded to any of carbon atoms of a second position, a third position, and a fourth position when a position number of a carbon atom bonded to Y is a first position, but the carbon atom of the fourth position is preferable.
- Y represents -SO2- or -CO- as described above, and is preferably -SO2-.
- That is, the dihalogeno compound (A) is preferably bis(4-chlorophenyl) sulfone to which any one or both of R3 and R4 may be bonded instead of a hydrogen atom.
- In the formula, R3 and R4 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.
- The alkyl group in R3 and R4 may be in any of a straight-chain shape, a branched shape, and a cyclic shape, but is preferably a straight-chain shape or a branched shape. Examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- The alkoxy group in R3 and R4 may be in any of a straight-chain shape, a branched shape, and a cyclic shape, but is preferably a straight-chain shape or a branched shape. Examples thereof include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a sec-butoxy group, and a tert-butoxy group.
- In the formula, n3 is a bond number of R3, n4 is a bond number of R4, and R3 and R4 each independently represents an integer of 0 to 4.
- In a case where n3 and n4 are other than 0, a bond position of corresponding R3 and R4 is not particularly limited as long as the bond position is other than a bond position of a halogen atom of X and X' and Y, and when the position number of the carbon atom to which a sulfonyl group of a benzene ring skeleton is bonded may be set as a first position, R3 and R4 may be bonded to any of carbon atoms of a second position, a third position, a fourth position, a fifth position, and a sixth position, R3 and R4 are preferably bonded to a carbon atom other than the fourth position, and are preferably bonded to carbon atoms of the third position and the fifth position.
- In a case where n3 or n4 is an integer of 2 to 4, a plurality of R3 or R4 each independently may be the same as one another, or may be different from one another. For example, in a case where n3 is an integer of 2 to 4, all of n3 R3 may be the same, or may be different, and in a case where n3 is 3 or 4, only some thereof may be the same. n4 R4 may be also the same.
n3 and n4 each independently is preferably an integer of 0 to 3, more preferably an integer of 0 to 2, and particularly preferably 0 or 1. - Preferable examples of the dihalogeno compound (A) include bis(4-chlorophenyl) sulfone (also referred to as 4,4'-dichlorodiphenyl sulfone).
- The divalent phenol (B) is represented by the following general formula (B).
- In the divalent phenol (B), two hydroxy groups (-OH) may be bonded to any of carbon atoms of a second position, a third position, and a fourth position when the position number of carbon atoms to which Z is bonded is set as a first position, but is preferably bonded to a carbon atom of the fourth position.
- Z represents a single bond, an alkylidene group having 1 to 10 carbon atoms, -SO2-, or -CO-, as described above, and is preferably -SO2-.
- In the formula, R1 and R2 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and R3 and R4 are the same.
- In addition, n1 is a bond number of R1, n2 is a bond number of R2, and n1 and n2 each independently represents an integer of 0 to 4. n1 and n2 are the same as n3 and n4.
- That is, in a case where n1 and n2 are other than 0, a bond position of corresponding R1 and R2 is not particularly limited as long as the bond position of corresponding R1 and R2 is other than bond positions of a hydroxy group or Z, and when a position number of a carbon atom to which a sulfonyl group of benzene ring skeleton is bonded is set as a first position, R1 and R2 may be bonded to any of carbon atoms of a second position, a third position, a fourth position, a fifth position, and a sixth position, preferably bonded to carbon atoms other than those of the fourth position, and preferably bonded to carbon atoms of the third position and the fifth position.
- In a case where n1 or n2 is an integer of 2 to 4, a plurality of R1 and R2 may be the same as one another, or may be different from one another. For example, in a case where n1 is an integer of 2 to 4, all of n1 R1 may be the same, or may be different, and in a case where n1 is 3 or 4, some of n1 R1 may be the same. n2 R2 is also the same.
n1 and n2 each independently may be preferably an integer of 0 to 3, more preferably an integer of 0 to 2, and particularly preferably 0 or 1. - Examples of preferable divalent phenol (B) include bis(4-hydroxyphenyl) sulfone and bis(4-hydroxy-3,5-dimethyl phenyl) sulfone to which any one or both of R1 and R2 may be bonded instead of a hydrogen atom.
- Polymerization (polycondensation) of the dihalogeno compound (A) and the divalent phenol (B) is preferably performed by using an alkali metal salt of carbonic acid as a base, is preferably performed in an organic solvent as a polymerization solvent, and is more preferably performed in an organic solvent by using an alkali metal salt of carbonic acid as a base.
- The alkali metal salt of a carbonic acid may be alkali carbonate (carbonate of alkali metal) which is a normal salt, may be alkali bicarbonate (alkali hydrogen carbonate, hydrogen carbonate of alkali metal) which is an acid salt, or may be a mixture of these (alkali carbonate and alkali bicarbonate).
- Preferable examples of the alkali carbonate include sodium carbonate, potassium carbonate, and the like.
- Preferable examples of the alkali bicarbonate include sodium bicarbonate (also referred to as sodium hydrogen carbonate), potassium bicarbonate (also referred to as potassium hydrogen carbonate), and the like.
- The organic solvent is preferably an organic polar solvent.
- Examples of such organic polar solvents include dimethyl sulfoxide (melting point: 19°C), 1-methyl-2-pyrrolidone (melting point: -24°C), sulfolane (1,1-dioxochiran) (melting point: 27.5°C), 1,3-dimethyl-2-imidazolidinone (melting point: 8.2°C), 1,3-diethyl-2-imidazolidinone, dimethyl sulfone (melting point: 109°C), diethyl sulfone (melting point: 73°C), diisopropyl sulfone, diphenyl sulfone (melting point: 127°C), and the like.
- First, the dihalogeno compound (A) and the divalent phenol (B) are dissolved in an organic solvent.
- A temperature of dissolving the dihalogeno compound (A) and the divalent phenol (B) is, for example, in a range of 40°C to 180°C.
- A total mass of the dihalogeno compound (A) and the divalent phenol (B) with respect to 1kg of the organic solvent is 0.3 to 3.0 kg, and is preferably 0.5 to 1.7 kg. When the total mass of the dihalogeno compound (A) and the divalent phenol (B) with respect to 1 kg of the organic solvent is 0.3 to 3.0 kg, intermediate particles to be described below include an appropriate amount of the organic solvent.
- Subsequently, by adding an alkali metal salt of carbonate to a mixture solution obtained by dissolving the dihalogeno compound (A) and the divalent phenol (B) in an organic solvent, the dihalogeno compound (A) and the divalent phenol (B) are polymerized. Hereinafter, a mixture solution including an aromatic polyether generated by polymerization, an organic solvent, and a salt derived from an alkali metal salt of carbonate is referred to as a reaction mixture.
- A ratio of the alkali metal salt of carbonate with respect to the divalent phenol (B) is 47 to 52 mol%, and is more preferably 48 to 51 mol%. When the ratio of the alkali metal salt of carbonate is 47 to 52 mol%, intermediate particles to be described later include an appropriate amount of salt derived from the alkali metal salt of carbonate.
- A polymerization temperature is preferably 160°C to 400°C.
- In addition, in the polymerization, the temperature is gradually raised while removing by-produced water to reach a reflux temperature of the organic polar solvent, and the temperature may be preferably maintained for 1 to 50 hours, and more preferably maintained for 2 to 30 hours.
- If side reactions do not occur, the higher the polymerization temperature becomes, or the longer the polymerization time becomes, polymerization to be performed proceeds, and a degree of polymerization of the obtained aromatic polyether becomes high. As a result, there is a tendency that a reduced viscosity of aromatic polyether becomes high, and a number-average molecular weight Mn becomes large. During the polymerization, a polymerization temperature is adjusted such that aromatic polyether having a predetermined reduced viscosity or Mn is obtained.
- A method of polymerization is not limited to the above-described method. For example, polymerization may be performed by reacting the divalent phenol (B) and an alkali metal salt of carbonate in an organic solvent, removing by-produced water, and adding the dihalogeno compound (A) to the obtained reaction mixture.
- The reduced viscosity of the obtained aromatic polyether is preferably equal to or less than 0.36 dL/g.
- In addition, the reduced viscosity of the aromatic polyether is preferably equal to or more than 0.18 dL/g.
- The reduced viscosity of the aromatic polyether is preferably 0.18 to 0.36 dL/g, and more preferably 0.22 to 0.28 dL/g. The higher the reduced viscosity of the aromatic polyether becomes, heat resistance or strength and rigidity are easily improved, but if the reduced viscosity is higher than 0.36 dL/g, a melting temperature or a melt viscosity easily becomes high, and fluidity easily becomes low.
- In the present specification, as a reduced viscosity (Rv) of the aromatic polyether, a value measured by the following method is employed.
- First, approximately 1 g of the aromatic polyether is precisely weighed, dissolved in N,N-dimethyl formamide, the volume is set as 1 dL, and a viscosity (η) of the solution is measured at 25° C by using an Ostwald type viscosity tube. In addition, a viscosity (η0) of N,N-dimethyl formamide which is a solvent is measured at 25°C by using an Ostwald type viscosity tube.
- From the obtained viscosity (η) of the solution and viscosity (η0) of the solvent, a specific viscosity ((η-η0)/(η0)) is obtained. A value obtained by dividing the obtained specific viscosity by a concentration (approximately 1 g/dL) of the solution used for measurement is regarded as a reduced viscosity (dL/g) of aromatic polyether.
- Subsequently, a thermoplastic resin is precipitated from a reaction mixture obtained in the step of polymerizing a thermoplastic resin, and intermediate particles containing the thermoplastic resin (hereinafter, referred to as intermediate particles) are obtained.
- In a case of using an organic solvent having a relatively high melting point (specifically, a melting point is equal to or more than 40°C) as a polymerization solvent, by cooling a reaction mixture to a melting point of the solvent used at the time of polymerization or less, the solvent and aromatic polyether contained in the reaction mixture are precipitated. Simultaneously, the entirety of the reaction mixture is solidified. Thereafter, by mechanically pulverizing the obtained solid, it is possible to obtain intermediate particles. The obtained intermediate particles include the solvent and a salt contained in the reaction mixture used at the time of polymerization as solids.
- As other methods, it is possible to obtain intermediate particles by mixing a reaction mixture product and a poor solvent of aromatic polyether and precipitating aromatic polyether contained in the reaction mixture product. At this time, the precipitated aromatic polyether may be pulverized at an appropriate size to obtain the intermediate particles. The reaction mixture is, for example, cooled to room temperature. The obtained intermediate particles include the solvent and a salt included in the reaction mixture and used at the time of polymerization. Examples of the poor solvent of aromatic polyether include methanol, ethanol, 2-propanol, hexane, heptane, and water.
- A median particle diameter (median diameter) D50 of the intermediate particles is, for example, 200 µm to 1,000 µm.
- The median particle diameter (median diameter) D50 of the intermediate particles can be measured by a laser diffraction dry measurement method. More specifically, under the following condition, a particle distribution is measured by a laser diffraction cyclic measurement method using a particle size distribution measurement apparatus (manufactured by Malvern Corporation, Mastersizer 2000), and the median particle diameter D50 is obtained from the measurement result.
- Pre-preparation: A small amount of sample (several g) is set to a dispersion unit (manufactured by Malvern Corporation, scirocco 2000).
- Measurement method: A dry method
- Particle refractive index: 1.65
- Dispersion air pressure: 2.8 bar (1 bar = 100 kPa)
- Analysis mode: MS2000 general purpose
- Median particle diameter D50: Particle diameter data corresponding to cumulative 50 vol% of the obtained particle size distribution result
- Subsequently, intermediate particles are washed to obtain resin particles having a BET specific surface area of equal to or more than 5 m2/g.
FIG. 2 is a schematic view illustrating an aspect of washing in Step S3. InFIG. 2 , intermediate particles are indicated asreference numeral 100, and the resin particles obtained by washing are indicated asreference numeral 150. - The illustrated
intermediate particles 100 include aresin portion 101 in which aromatic polyether has been solidified, asalt 102 of which at least a part is included in theresin portion 101, and apolymerization solvent 103 of which at least a part is included in theresin portion 101. - A ratio of the
resin portion 101 with respect to a mass of theintermediate particles 100 is 20% by mass to 60% by mass, and more preferably 30% by mass to 50% by mass. As the ratio of theresin portion 101 is 20% by mass to 60% by mass, it is possible to set a BET specific surface area of the resin particles to be 5 m2/g. - For washing of the
intermediate particles 100, it is preferable to use water or hot water. By washing theintermediate particles 100 with water or hot water, it is possible to remove a water-soluble salt 102 such as a non-reactive base included in intermediate particles and by-produced halogenized alkali metal salt. When thesalt 102 is removed, avoid 109 is generated at a site where thesalt 102 was present. - In addition, it is preferable to wash the
intermediate particles 100 by using an organic solvent. By washing theintermediate particles 100 with an organic solvent, it is possible to remove apolymerization solvent 103 in which theintermediate particles 100 are included. At this time, in a case where the removedpolymerization solvent 103 is solidified in theintermediate particles 100, thevoid 109 is generated at a site where thepolymerization solvent 103 was present. - Examples of a washing solution used for washing include alcohols such as methanol, ethanol, and 2-propanol, ketones such as acetone, methyl ethyl ketone, ethers such as diethyl ether, and esters such as ethyl acetate and butyl acetate. These may be used alone, or two or more by mixing with one another. Depending on the kind of the
polymerization solvent 103 to be removed, appropriate selection can be made. - The particles (resin portion 101) after washing are appropriately washed with water, the salt and the organic solvent included in the void 109 are replaced with water, and then dried to obtain
resin particles 150 having a plurality ofvoids 109. - The order of washing using water or hot water and washing using the organic solvent may be reversed. In addition, the order of washing using water or hot water and washing using the organic solvent may be reversed. At this time, after performing washing using water or hot water a plurality of times, washing using the organic solvent may be performed a plurality of times, and washing using water or hot water and washing using the organic solvent may be alternately performed a plurality of times.
- Here, in the present embodiment, at the time of washing of the
intermediate particles 100, theintermediate particles 100 are preferably in a fixed phase. For example, at the time of washing of theintermediate particles 100, it is preferable to use a fixed bed type washing apparatus. The "fixed bed type washing apparatus" in the present application indicates an apparatus of a type for washing theintermediate particles 100 in a state of fixing theintermediate particles 100 in a container accommodating theintermediate particles 100 which are washing subjects in a washing apparatus. In a washing apparatus having such a configuration, as theintermediate particles 100 do not flow and the washing solution passes through the inside of particles or between particles, it is possible to elute impurities (salt 102, polymerization solvent 103) from theintermediate particles 100 to the washing solution. - As the fixed bed type washing apparatus, for example, a washing apparatus in which
intermediate particles 100 are filled in a column, and a washing solution is distributed from a column upper portion, a washing apparatus in which a washing solution is distributed by a centrifugal force, or a washing apparatus in which a washing solution is distributed by pressurization or a reduced pressure is exemplified. The washing solution may be provided such that theintermediate particles 100 are immersed in the washing solution, or may be provided by being sprayed on a surface of theintermediate particles 100. - In a fixed bed type washing apparatus of the above-described method using a column, a pressure may be applied to a washing liquid surface or a normal pressure may be applied thereto.
- A passing liquid amount of the washing solution is preferably 30 kg to 1,000 kg, more preferably 50 kg to 500 kg, and further more preferably 100 kg to 400 kg, with respect to 1 kg of the
resin particles 150 included in theintermediate particles 100. In a column type fixed bed type washing apparatus, such an amount of washing solution is preferably fed in a state in which an upper surface of cake made of theintermediate particles 100 filled in a column is immersed in the washing solution. Here, an amount of theresin particles 150 included in theintermediate particles 100 can be estimated from a charge amount of a monomer or a past reaction result. - In addition, a height (cake height) of the
intermediate particles 100 provided a fixed bed type washing apparatus is preferably 30 cm to 200 cm, and more preferably 50 cm to 150 cm. There is a tendency that, by setting the cake height to be equal to or less than 200 cm, it is possible to suppress collapse of theintermediate particles 100 due to their own weight. In addition, there is a tendency that, by setting the cake height to be equal to or more than 30 cm, it is possible to obtain sufficient washing efficiency. That is, by setting the cake height in the range described above, it is possible to more preferably obtain resin particles having a BET specific surface area of equal to or more than 5 m2/g. - When washing the
intermediate particles 100, for example, a method of stirring and dispersing theintermediate particles 100 in a washing solution and then removing the washing solution, such as repulp washing which is generally used, is also considered. However, when washing was performed while causing theintermediate particles 100 to flow, the inventors found that resin particles having a BET specific surface area of equal to or more than 5 m2/g as a subject are hardly obtained. - In the present embodiment, by performing washing having the
intermediate particles 100 as a fixed phase as described above, for example, by washing the resin particles using a fixed bed type washing apparatus, it is possible to preferably obtainresin particles 150 having a BET specific surface area of equal to or more than 5 m2/g. Theresin particles 150 obtained as above correspond to the "resin particles" in the present invention. The resin particles are raw materials used in production of resin microparticles. - The BET specific surface area of the
resin particles 150 is preferably equal to or more than 7 m2/g, and more preferably equal to or more than 10 m2/g. In addition, the BET specific surface area of theresin particles 150 is preferably as wide as possible, but is in a certain range considering the ease of production. The BET specific surface area of theresin particles 150 is preferably equal to or less than 100 m2/g, more preferably equal to or less than 50 m2/g, and further more preferably equal to or more than 30 m2/g. - An upper limit and a lower limit of the BET specific surface area can be optionally combined with each other. For example, the BET specific surface area is preferably 5 m2/g to 100 m2/g, more preferably 7 m2/g to 50 m2/g, and further more preferably 10 m2/g to 30 m2/g.
- A pore volume of the
resin particles 150 is preferably equal to or more than 0.08 cm3/g, and more preferably equal to or more than 0.1 cm3/g. In addition, the pore volume of theresin particles 150 is preferably as large as possible, but may be in a certain range considering the ease of production. The pore volume of theresin particles 150 is preferably equal to or more than 0.6 cm3/g, and more preferably equal to or less than 0.4 cm3/g. - An upper limit and a lower limit of the pore volume can be optionally combined. For example, the pore volume is preferably 0.08 cm3/g to 0.6 cm3/g, and more preferably 0.1 cm3/g to 0.4 cm3/g.
- In the present specification, the BET specific surface area and the pore volume can be measured by using a BET specific surface area meter. More specifically, under the following condition, the values are values measured by a nitrogen adsorption method.
- Pretreatment method: Vacuum degassing is performed at 120°C for 8 hours using a vacuum heat pretreatment apparatus (manufactured by MicrotracBell Corporation, BELPREP-vacII).
- Measurement method: Under the following condition, by performing measurement using a specific surface area meter (manufactured by MicrotracBell Corporation, BELSORP-mini), an adsorption-desorption isotherm of nitrogen is measured using a constant volume method, and calculated by a BET method.
- Adsorption temperature: 77K
- Adsorbate sectional area: 0.162 nm2
- Adsorbate: nitrogen
- Equilibrium standby time: 500 seconds
- Saturation steam pressure: Actually measured
- The BET specific surface area is affected by a particle size, but in the
resin particles 150 of the present embodiment, an amount of the void 109 formed in theresin particles 150 is more dominant. For example, in a case of resin particles having an average particle diameter of 200 µm that have no void therein, the BET specific surface area becomes much lower than 5 m2/g, but in theresin particles 150 of the present invention, as a plurality ofvoids 109 are present inside, a BET specific surface area of equal to or more than 5 m2/g is realized. That is, the resin particles in the present embodiment are particles having a plurality of voids therein. - Subsequently, the
resin particles 150 having a BET specific surface area of equal to or more than 5 m2/g are pulverized using an impact type pulverizer to obtain microparticles of a thermoplastic resin. In Step S4, a median particle diameter D50 of theresin particles 150 is equal to or more than 200 µm, and preferably 200 µm to 1,000 µm. In addition, in Step S4, the median particle diameter D50 of the obtained resin microparticles is
10 µm to 100 µm. - That is, in Step S4, the
resin particles 150 having a BET specific surface area of equal to or more than 5 m2/g are pulverized using an impact type pulverizer such that the median particle diameter D50 of the obtained resin particles is 10 µm to 100 µm. - In the present embodiment, since the
resin particles 150 as a pulverization subject are porous, it is possible to easily perform pulverization at normal temperature. Therefore, efficiency of pulverization processing is improved compared to a method in the related art in which the pulverization subject is solid resin particles. - As the impact type pulverizer, a commercially available device can be appropriately used. As the commercially available impact type pulverizer, for example, an ACM Pulverizer (manufactured by Hosokawa Micron Corporation) and the like can be used.
- As a condition of pulverizing the
resin particles 150 having a BET specific surface area of equal to or more than 5 m2/g using an impact type pulverizer, it is preferable that, at normal temperature, a pulverizer current be 45 to 71 A (30 to 35 A at the time of idling), a classifier current be 6.5 to 7.5 A (6.0 to 7.0 A at the time of idling), a feed rate of theresin particles 150 be 30 to 40 kg/hr, and an operation time be equal to or longer than 10 min. - The resin microparticles produced in such a manner can shorten a dissolution time for dissolving into a liquid such as a monomer of a thermoplastic resin. For this reason, the resin microparticles produced by the resin microparticle production method of the present embodiment are excellent in productivity in production of a composite including a thermosetting resin and aromatic polyether.
- The resin microparticle production method and the resin particles of the present embodiment have the above-described structure.
- According to the production method of the resin microparticles having such a structure, processing capability of micronizing processing using an impact type pulverizer at normal temperature is improved.
- In addition, the resin particles having the above-described structure are appropriate for micronizing processing at normal temperature.
- Another aspect of the present invention is a resin microparticle production method including a step of pulverizing resin particles of a thermoplastic resin having a BET specific surface area of 5 m2/g to 100 m2/g and having a sulfonyl group in a main chain using an impact type pulverizer.
- Prior to the pulverizing step, a step of synthesizing the thermoplastic resin by polymerizing the general formula (A) and the general formula (B) in a solvent, a step of obtaining intermediate particles containing the thermoplastic resin by precipitating the thermoplastic resin from a reaction mixture obtained in the synthesizing step, and a step of obtaining resin particles by washing the obtained intermediate particles as a solid phase may be included, Y in the general formula (A) is -SO2-, X and X' each independently represents a halogen atom, R3 and R4 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, n3 and n4 is 0 or 1, Z in the general formula (B) is -SO2-, R1 and R2 each independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and n1 and n2 are 0 or 1.
- A pore volume of the resin particle may be equal to or more than 0.08 cm3/g and equal to or less than 0.6 cm3/g.
- Another aspect of the present invention is a resin particle production method including a step of synthesizing the thermoplastic resin by polymerizing a monomer in a solvent, a step of obtaining intermediate particles containing the thermoplastic resin by precipitating the thermoplastic resin from a reaction mixture obtained in the synthesizing step, and a step of obtaining resin particles by washing the obtained intermediate particles as a solid phase.
- The resin particles produced by the resin particle production method may be resin particles including aromatic polyether sulfone and having a BET specific surface area of equal to or more than 5 m2/g.
- Hereinafter, the present invention will be described using examples, but the present invention is not limited to the examples.
- In the present example, each of physical properties was measured by the following measurement method.
- A BET specific surface area and a pore volume of the particle were measured by a nitrogen adsorption method under the following condition.
- Pretreatment method: Vacuum degassing was performed at 120°C for 8 hours.
- Measurement method: An adsorption-desorption isotherm of nitrogen was measured using a constant volume method.
- Adsorption temperature: 77 K
- Adsorbate sectional area: 0.162 nm2
- Adsorbate: nitrogen
- Equilibrium standby time: 500 seconds
- Saturation steam pressure: Actually measured
- BET specific surface area: Calculated by a BET method
- Pore volume: Calculated by a BJH method
- Measurement apparatus: BET specific surface area meter (manufactured by MicrotracBell Corporation, BELSORP-mini)
- Pretreatment apparatus: Vacuum heat pretreatment apparatus (manufactured by MicrotracBell Corporation, BELPREP-vacII)
- A particle size distribution was measured by a laser diffraction dry measurement method and a median particle diameter D50 of a particle is obtained from the measurement result.
- Pre-preparation: A small amount (several g) of a sample is set in a dispersion unit.
- Measurement method: A particle size distribution was measured by a laser diffraction dry measurement method.
- Measurement method: A dry method
- Particle refractive index: 1.65
- Dispersion air pressure: 2.8 bar (1 bar = 100 kPa)
- Analysis mode: MS2000 general purpose
- Median particle diameter D50: Particle diameter data corresponding to cumulative 50 vol% of the obtained particle size distribution result
- Measurement apparatus: A particle size distribution measurement apparatus (manufactured by Malvern Corporation, Mastersizer 2000)
- Dispersion unit: Dispersion unit (manufactured by Malvern Corporation, scirocco 2000)
- First, approximately 1 g of aromatic polyether was precisely weighed, dissolved in N,N-dimethylformamide, the volume was set as 1 dL, and a viscosity (η) of the solution was measured at 25°C using an Ostwald type viscosity tube. In addition, the viscosity (η0) of N,N-dimethylformamide which is a solvent was measured at 25°C using an Ostwald type viscosity tube.
- From the obtained viscosity (η) of the solution and the viscosity (η0) of the solvent, a specific viscosity ((η-η0)/η0) was obtained. A value obtained by dividing the obtained specific viscosity by a concentration (approximately 1 g/dL) of the solution used in measurement was regarded as a reduced viscosity (dL/g) of aromatic polyether.
- A washed state of the resin particle was checked by measuring an amount of residual diphenyl sulfone of the resin particle.
- Approximately 1 g of the resin particle was precisely weighed, and added to a mixture solution of acetone: methanol = 6 mL: 4 mL. Stirring was performed at room temperature for 1 hour to extract diphenyl sulfone in the resin particle to the mixture solvent, and diphenyl sulfone in the mixture solvent was quantified by gas chromatography.
- Bis(4-hydroxyphenyl) sulfone (300.3 g, 1.20 mol), bis(4-chlorophenyl) sulfone (331.5 g, 1.16 mol), and diphenyl sulfone (560.9 g) as a polymerization solvent were charged in a polymerization vessel equipped with a stirrer, a nitrogen introduction tube, a thermometer, and a capacitor attached with a receiver in the tip end, and the temperature was raised to 180°C while distributing nitrogen gas in the system.
- Subsequently, potassium carbonate (160.1 g, 1.16 mol) was added to the obtained solution, the temperature was gradually raised to 290°C, and reaction was further performed at 290°C for 3 hours to polymerize polyether sulfone (PES).
- Subsequently, the obtained reaction solution was cooled and solidified, and then the obtained solid was finely pulverized to obtain intermediate particles containing a thermoplastic resin. A BET specific surface area of the obtained intermediate particles was 0.25 m2/g.
- Subsequently, the obtained intermediate particles were dispersed in warm water (60°C), and washed by stirring. A BET specific surface area of the intermediate particles after washing with warm water was 0.28 m2/g. Subsequently, a mixture solvent of acetone/methanol (acetone: methanol = 50: 50) was dispersed and washed by stirring.
- Subsequently, the intermediate particles after washing were filled in a column type fixed bed washer. The mixture solvent of acetone/methanol (acetone: methanol = 50: 50) was dipped from above the fixed bed washer to further wash the intermediate particles.
- At this time, a temperature of the mixture solvent was 20°C. In addition, 1 kg of resin particles contained in the intermediate particles filled in the fixed bed type washer was washed using 250 kg of the mixture solvent as a washing solution. A height (cake height) of the resin particles filled in the column was 110 cm.
- The obtained solid was heated and dried at 150°C to obtain resin particles of Example 1. In the obtained resin particles, a BET specific surface area = 17.0m2/g, D50 = 480µm, RV = 0.270, and residual diphenyl sulfone was equal to or less than 0.4% by mass.
- By the same operation as that of Example 1 except that the washing condition using a fixed bed type washer was changed, resin particles of Example 2 were obtained. In the obtained resin particles, a BET specific surface area = 14.1 m2/g, D50 = 550 µm, RV = 0.274, and residual diphenyl sulfone was equal to or less than 0.4% by mass.
- The intermediate particles obtained by the same operation as that of Example 1 were dispersed in warm water (60°C) in a washing tank equipped with a stirrer, stirred washing was performed, and then solid-liquid separation was performed. Stirred washing with warm water was performed three times.
- In addition, the obtained intermediate particles after warm water washing were dispersed in a mixture solvent of acetone/methanol (acetone: methanol = 50: 50) in a washing tank equipped with a stirrer, and then solid-liquid separation was performed. Stirred washing with the mixture solvent of acetone/methanol was performed four times. At this time, for each washing, 1 kg of resin particles contained in the intermediate particles after warm water washing was washed using 15 kg of the mixture solvent as a washing solution.
- The obtained solid was further washed with water.
- The obtained solid was heated and dried at 150°C to obtain resin particles of Comparative Example 1. In the obtained resin particles, a BET specific surface area = 3.7 m2/g, D50 = 760 µm, RV = 0.261, and residual diphenyl sulfone was equal to or less than 0.4 % by mass.
- By the same operation as that of Comparative Example 1 except that the stirring rate in the stirred washing was changed, resin particles of Comparative Example 2 were obtained. In the obtained resin particles, a BET specific surface area = 4.1 m2/g, D50 = 670 µm, RV = 0.278, and residual diphenyl sulfone was equal to or less than 0.4 % by mass.
- The resin particles obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were pulverized at normal temperature by an impact type pulverizer (manufactured by Hosokawa Micron Corporation, ACM pulverizer) to obtain resin microparticles of aromatic polyether sulfone. At this time, a feed rate was adjusted such that pulverization load of the apparatus was the maximum so as to obtain maximum processing capacity.
- The result is shown in the following Table 1.
[Table 1] Resin particle Resin microparticle Processing capacity (kg/time) Median particle diameter (µm) Reduced viscosity (dL/g) BET specific surface area (m2/g) Pore volume (cm3/g) Median particle diameter (µm) Example 1 480 0.270 17.0 0.191 40.1 39 Example 2 550 0.274 14.1 0.133 30.3 37 Comparative Example 1 760 0.261 3.7 0.046 38.7 22 Comparative Example 2 670 0.278 4.1 0.052 41.6 24 - As a result of evaluation, in a case of using the resin particles of Examples 1 and 2, processing capacity of pulverization processing was improved compared to a case of using the resin particles of Comparative Examples 1 and 2.
- From the above result, it was found that the present invention is useful.
- According to the present invention, it is possible to provide a resin microparticle production method with improved processing capacity and resin particles appropriate for micronization processing.
- 100...Intermediate particles, 101 ...Resin portion, 102...Salt impurities, 103...Polymerization solvent, 109... Void, 150...Resin particles
Claims (6)
- A resin microparticle production method, comprising:a step of pulverizing resin particles of a thermoplastic resin having a BET specific surface area of equal to or more than 5 m2/g using an impact type pulverizer, wherein the thermoplastic resin has an aromatic group in a main chain, wherein a median particle diameter D50 of the resin particles is equal to or more than 200 µm, andwherein a median particle diameter D50 of the resin microparticle is 10 µm to 100 µm, wherein the median particle diameter D50 and the BET specific surface area are measured as described in the description.
- The resin microparticle production method according to Claim 1, further comprising:a step of synthesizing the thermoplastic resin by polymerizing a monomer in a solvent;a step of precipitating the thermoplastic resin from a reaction mixture obtained in the synthesizing step to obtain intermediate particles containing the thermoplastic resin; anda step of washing the obtained intermediate particles in a fixed bed type washing apparatus to obtain the resin particles, prior to the pulverizing step.
- The resin microparticle production method according to Claim 1,
wherein the thermoplastic resin has a sulfonyl group in the main chain. - The resin microparticle production method according to Claim 3,
wherein the thermoplastic resin is aromatic polyether sulfone. - The resin microparticle production method according to any one of Claims 1 to 4,
wherein a reduced viscosity (Rv) of the thermoplastic resin is equal to or less than 0.36 dL/g, wherein the reduced viscosity is measured as described in the description. - Use of resin particles of aromatic polyether sulfone as a forming material in a method as defined in claims 1 to 5, wherein the resin particles have a BET specific surface area of equal to or more than 5 m2/g, wherein a median particle diameter D50 of the resin particles is equal to or more than 200 µm, and
wherein a median particle diameter D50 of the resin microparticle is 10 µm to 100 µm, wherein the median particle diameter D50 and the BET specific surface area are measured as described in the description.
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JP2017001142A JP7046489B2 (en) | 2017-01-06 | 2017-01-06 | Manufacturing method of resin fine particles, resin particles |
PCT/JP2017/046333 WO2018128108A1 (en) | 2017-01-06 | 2017-12-25 | Resin microparticle production method and resin particles |
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EP (1) | EP3567071B1 (en) |
JP (1) | JP7046489B2 (en) |
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CH587875A5 (en) * | 1973-01-26 | 1977-05-13 | Inventa Ag | |
US3933764A (en) | 1974-07-25 | 1976-01-20 | Union Carbide Corporation | Coagulative recovery of polysulfone resins from solutions thereof |
CA1191823A (en) * | 1982-02-01 | 1985-08-13 | Robert S. Kiwak | Method for forming fine powders from resilient polymers by reactive grinding |
JPH0768379B2 (en) | 1986-02-12 | 1995-07-26 | 東レ株式会社 | Method for producing resin composition for prepreg |
DE3644464A1 (en) | 1986-12-24 | 1988-07-07 | Basf Ag | METHOD FOR ISOLATING PARTICLE POLYMERS |
GB8715530D0 (en) * | 1987-07-02 | 1987-08-12 | Ici Plc | Microporous products |
US5215854A (en) * | 1988-10-05 | 1993-06-01 | Canon Kabushiki Kaisha | Process for producing microcapsule toner |
US4945154A (en) | 1989-07-07 | 1990-07-31 | Hexcel Corporation | Densified polyethersulfone |
JPH0467912A (en) * | 1990-07-09 | 1992-03-03 | Nippon Petrochem Co Ltd | Manufacture of spherical fine powder of thermoplastic resin |
JP2003010633A (en) * | 2001-07-04 | 2003-01-14 | Asahi Glass Co Ltd | Gas treatment method |
JP2006015497A (en) | 2004-06-30 | 2006-01-19 | Hosokawa Micron Corp | Method and apparatus for grinding thermoplastic resin-containing material |
DE102004062762A1 (en) | 2004-12-21 | 2006-06-22 | Degussa Ag | Fine-grained polyarylene ether ketone powder |
JP5017886B2 (en) | 2006-03-03 | 2012-09-05 | 横浜ゴム株式会社 | Method for producing epoxy resin composition |
JP4947707B2 (en) | 2007-02-09 | 2012-06-06 | ホソカワミクロン株式会社 | Crusher |
US20110311816A1 (en) * | 2007-08-10 | 2011-12-22 | Toray Industries, Inc. | Aromatic polyethersulfone having hydroxyphenyl end groups and method for producing the same |
KR101596529B1 (en) | 2008-03-28 | 2016-02-22 | 도레이 카부시키가이샤 | Process for producing fine particles of polyphenylene sulfide resin, fine particles of polyphenylene sulfide resin, and dispersion thereof |
CN101704951B (en) * | 2009-10-27 | 2012-01-25 | 金发科技股份有限公司 | Method for preparing terpolymer of poly-diphenyl sulphone ether and polyether sulfone |
ES2758653T3 (en) * | 2009-11-20 | 2020-05-06 | Asahi Chemical Ind | Porous molded article and procedure to manufacture it |
JP2013221071A (en) * | 2012-04-16 | 2013-10-28 | Sumitomo Chemical Co Ltd | Method for producing aromatic polysulfone |
JP6342328B2 (en) * | 2012-07-23 | 2018-06-13 | 株式会社ダイセル | Stationary phase |
WO2015124521A1 (en) * | 2014-02-19 | 2015-08-27 | Basf Se | Method for drying particulate polymers |
DE112016001236T5 (en) * | 2015-03-17 | 2017-12-14 | Sumitomo Chemical Company, Limited | Aromatic polysulfones |
JP5982042B1 (en) | 2015-06-11 | 2016-08-31 | ロボテック株式会社 | Shock absorber in robot arm |
CN105086454A (en) * | 2015-09-16 | 2015-11-25 | 苏州大学 | High-temperature resistance polyether sulfone nano-porous microspheres and preparation method thereof |
EP3375465A4 (en) * | 2015-11-11 | 2018-11-07 | Asahi Kasei Medical Co., Ltd. | Phosphorus adsorbent for blood processing, blood processing system and blood processing method |
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EP3567071A1 (en) | 2019-11-13 |
EP3567071A4 (en) | 2020-07-29 |
CN110139891A (en) | 2019-08-16 |
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